Merge bitcoindevkit/bdk#675: Use T: AsRef<Path> as param to SqliteDatabase::new

558e37afa72b69228fc40cc20be9122b3ea00597 Use T: AsRef<Path> as param to SqliteDatabase::new (Vladimir Fomene)

Pull request description:

  This PR fixes #674

  ### Description

  Currently SqliteDatabase::new takes a String as path,
  with this change, it now accepts any type that implements
  AsRef<Path>.

  ### Notes to the reviewers

  ### Checklists

  #### All Submissions:

  * [x] I've signed all my commits
  * [x] I followed the [contribution guidelines](https://github.com/bitcoindevkit/bdk/blob/master/CONTRIBUTING.md)
  * [x] I ran `cargo fmt` and `cargo clippy` before committing

  #### New Features:

  * [ ] I've added tests for the new feature
  * [ ] I've added docs for the new feature
  * [x] I've updated `CHANGELOG.md`

  #### Bugfixes:

  * [ ] This pull request breaks the existing API
  * [ ] I've added tests to reproduce the issue which are now passing
  * [x] I'm linking the issue being fixed by this PR

ACKs for top commit:
  danielabrozzoni:
    utACK 558e37afa72b69228fc40cc20be9122b3ea00597

Tree-SHA512: c5ff5b60e5904a5b7ef492a1e40296864b6b7506e4c6a187cfab05ef8140d14ddd322d016b4eeb18c5cfca8d4b575370b4f13c6ea7d7374ab0372a3237a5ed94